Home / Standards / GB/T 34479-2017 GB/T 34479-2017 Active Specification for alphanumeric marking of silicon wafers 硅片字母数字标志规范 Standard Type GBT ICS 29.045 CCS H80 Status 现行 Issue Date 2017-10-14 Implementation 2018-07-01 Responsible Dept 国家标准委 Drafting Unit N/A